我为CanDeactivate函数添加了以下路由器保护,以验证未保存的更改,这对我来说很好用
export interface CanComponentDeactivate { canDeactivate :()=>可观察的|承诺|布尔; }
@Injectable()
export class CanDeactivateGuard implements CanDeactivate<CanComponentDeactivate> {
constructor( private eventService: EventsService) { }
canDeactivate(component: CanComponentDeactivate, route?: ActivatedRouteSnapshot,
currentState?: RouterStateSnapshot,
nextState?: string) {
let sub = new Subject();
if (BaseApiService.callStack.length || UnsavedData.isThereUnSavedData) {
this.eventService.triggerEvent(CONST.SHOW_DATA_LOSS_MODAL, {
showDataLossModal: true,
sub : sub
});
}
return BaseApiService.callStack.length || UnsavedData.isThereUnSavedData ? false : true;
}
}
但是当我检测到是否有任何未保存的更改时,我会显示一个带有是和否按钮的对话框。
如果用户点击“是”,我必须清除未保存的更改并重定向到用户点击的网址。为此,我必须检查用户想要在CanDeactivate函数上重定向的URL。
nextState?:string 但每次我都明白这一点。
如果我做了任何更改,请纠正我。
答案 0 :(得分:1)
你需要使用,
nextState?:RouterStateSnapshot
下面的是接口定义,
interface CanDeactivate<T> {
canDeactivate(component: T,
currentRoute: ActivatedRouteSnapshot,
currentState: RouterStateSnapshot,
nextState?: RouterStateSnapshot): Observable<boolean>|Promise<boolean>|boolean
}
检查定义here。
<强>更新强>
检查以下完整示例,
@Component({
selector: 'my-app',
template: `<h1>Hello {{name}}</h1>
<hr />
<a routerLink="/home" >Home</a>
<a routerLink="/other" >Other</a>
<hr />
<router-outlet></router-outlet>
`
})
class AppComponent { name = 'Angular'; }
@Component({
template: `<h1>Home</h1>
<a routerLink="/other" >Go to Other from Home</a>
`
})
class HomeComponent {
}
@Component({
template: `<h1>Other</h1>
`
})
class OtherComponent {
}
@Injectable()
class CanDeactivateHome implements CanDeactivate<HomeComponent> {
canDeactivate(
component: HomeComponent,
currentRoute: ActivatedRouteSnapshot,
currentState: RouterStateSnapshot,
nextState: RouterStateSnapshot
): Observable<boolean>|Promise<boolean>|boolean {
console.log(component);
console.log(currentRoute);
console.log(currentState);
console.log(nextState);
return true;
}
}
const appRoutes: Routes = [
{ path: '', redirectTo: '/home', pathMatch: 'full' },
{ path: 'home', component: HomeComponent, canDeactivate: [CanDeactivateHome] },
{ path: 'other', component: OtherComponent }
];
@NgModule({
imports: [ BrowserModule, RouterModule.forRoot(appRoutes)],
declarations: [ AppComponent, HomeComponent, OtherComponent ],
providers: [CanDeactivateHome],
bootstrap: [ AppComponent ]
})
export class AppModule { }
选中此Plunker!!
希望这会有所帮助!!